Coffee cleaner and grader



(No Model.) 2 Sheets,---Sheeizv 2.

E.' RAKESTRAW. GOPFEEGLBANBR AND Gimme.H e

No.'-24 9,398. Patented Nov.8,1881.`

WITNESSES: l INVENTOR:

i l 'BY WM/ ATTORNEYS.'

PATENT OFFICE.'

ELAM nAKnsrnAw, on on.MentheEPORT,.MASSACHUSETTS.`

COFFEE CLEANER AND GRADER.

SPECIFICATION forming part of Letters jPatent No. 249,398,`dated November 8, 1881.

l l j Application filed J uly 15, (No model.)

To all whom `it may concern Be it known that 1,*ELAM RAKESTRAW, o

Cambridgeport, in'` the county of Middlesex and `State of Massachusetts, have invented cery, tain new and useful Improvements in Coffee- Cleaners, of which the following is a specification.

Inthe accompanying drawings, Figure 1 is j a sectional elevation of my improvement. Fig.

2 isa plan view of the same, part bein g broken away. Fig. 3 is a sectional plan view of the same, taken through the broken line m x :c ar, Fig.,l. Fig. 4 is arear elevation of the same, part being broken away. Fig. 5 is a sectional end elevation of 'the same, taken through the broken line y y y, Fig. 3.

Similar letters of reference spondin g parts.

The object of this invention is to facilitate the cleaning of coffee.

The invention consists in the combination, with the frame, the pivoted suspension-bars, the vibrating shoe, and the fan-blower, of the series of screens, the series of screen-boards, theshoe bottom,thefour chutes,thefourspouts, the hinged wall, and the two partitions, whereby the whole berries and the broken and imperfect berries can be separated from each other and from impurities l: also, in the combination, with the shoe-bottom, the fan-blower, thespouts, and the chutes, of the separatingpartitions, whereby the whole berries and the broken and imperfect berries can be subjected to separate air-blasts at the same time.

In the drawings, A represents the frame of the machine.

To the top side bars of the frameAare pivl oted the upper ends ofthe han gin ghars B, the lower ends of which are pivoted to the lower part of the sides of the shoe O.

To the top of the front part of the frame A,

indicate cor-ref and directly over the forwardly-projecting upper part of the shoe C, is attached the hopper l), from which lthe coffee is fed into the machine. As the coffee escapes from the hopper D it falls upon a screen, E, secured in the forwardly-projecting upper part of the shoe C, through which a partof the fine dirt and broken andimperfect berries escape. From thescreen r E the coifee and the stones and coarser impurities pass over the board F, that serves as a continuation of the screen E, and escape through an opening, Gr, in the flange that surrounds the said screen and board. From the board F the coffee falls upon the screen H,

`through which the balance of the broken and imperfect berries and the fine impurities escape.

The `offee and the coarser impurities slide across the screen H, and fall from the rear end ofthe said screen into the chute I at the rear end of the shoe C, and are received upon the inclined bottom Jof the said shoe (l. The

spaceabove the bottom J ofthe shoe C is divided into two compartments by a partition, K, extending upto screen-board W, and meeting the forward extension of partition S from the wall R, and one end of the chute l is inclined, so that all that passes through the said chute will fall upon the wider part of the said bottom J. From the rear end of the bottom J the coffee falls into the chute L, where it meets the air-blast through the spout M from the fanblower N. The air-blast carries the coffee with it over the upper edge of the wall O ofthe chute L, and as the air-blast is weakened by entering the larger space ofthe spout P the coffee falls through the chute Q to the floor or into a receiver placed'beneath the said chute Q. The opendower part of the chute L allows small stones and pieces of dirt to be separated from the coffee and fall through into some receptaclc.` The upper part of the wall O is loose, and is hinged at its'lower edge to the upper edge of the lower stationary part of the said wall, so that it can be adjusted to regulate the force of the air-blast. The lower part ofthe rear wall, R, of the chute Q is movable,

and is hinged at its upper edge to the stationary upper part of the said Wall to serve as a doorto give access to the adjustable wall O.

The spouts M P and the chutes L Q are each divided into two compartments by a partition, S, in the same manner as the shoe bottom J. The fan-blower N is also made in two parts, as

' shown in Fig. 5, and its case is divided into two compartments by a continuation of the partition S. The broken and imperfect berries and the tine dirt that pass through the screen E slide down the bottom board T to the front partof the screen H and pass through the said screen. All the broken and imperfect berries IOO and the line dirt that pass through the screen H4 fall upon the screen-board U, slide rearwardly upon the said board, and fall from its rear end to the screen'V placed beneath the said screen board U. The fine dirt passes through the screen V, falls upon the screenboard W placed beneath the said screen, and escapes through the spout X to the floor or into a receiver placed beneath the vsaid spout X in board Y. The broken and imperfect berries and any dirt too coarse to pass through the screen Vfall from the front end of the said screen V through the chute Y to the bottom J of the shoe and are kept from mingling with the Whole berries by the partition K. The broken and imperfect berries and the dirtthat did notescape through the screen V pass rearward along the bottom J and the dirt escapes through a screen, Z, secured in an opening in the said bottom J, and passes out through the spouta. lhe broken andimperfect berries and the dirt that may be with them fall through the rearend of the narrower part of the bottom J and are operated upon and separated by the air,- blast in the same manner as hereinbefore de scribed with reference to the Whole berries.

To the front end of the shoe G is attached an arm, b, in an opening in which works an eccentric, c, attached to a shaft, d, so that the shoe C and its attachments will be vibrated by the revolution of the said shaft d. The shaft d revolves in bearings attached to the frame A, and to one ofits ends is attached a small pulley, e, to receive a driving-belt from any convenient power. To the other end of the shaft d is attached a larger pulley, f, around which passes a belt,g. The belt g also passes around a small pulley, 7L, attached tothe shaft h of the fan-blower N, to give motion to the fans.

Having thus fully described my invention, I claim as new and. desire to secure by Letters Patent- 1. In a coffee-cleaner, the combination, with the frame A, the pivoted suspensionbars B, the vibrating shoe C, and the fan-blower N, of the series of screens E H V Z, the series of screen boards F T U. W, the bottom J, the chutes I Y L Q, the sponts X a M P, the hinged Wall 0, and the partitions K S, substantially as herein shown and described, whereby the Whole berries and the broken and imperfect berries are separated from each other and from impurities, as set forth.

2. In a coffee-cleaner, the combination, with the shoe bottom J, the fan-blower N, the sponts M P, and the chutes L Q, of the partitions K S, substantially as herein shown and described, whereby the whole berries andthe broken and imperfect berries can be subjected to separate air-blasts at the same time, as set forth.

ELAM RAKESTRAW.

Witnesses:

F. P. TUCKER, JOHN C. MASON. 

